It would be great to hear any experiences or suggestions in regard to engine oil weight. In hot weather climates what are you running? 0w 5w 30/40? While I understand both ratings are startup viscosity and running viscosity, I’m trying protect and keep engine temps as low as possible in a hot ca climate. I know that 0x is especially good for very cold areas so startup viscosity is fast; I’m more concerned with running temps, would a x40 provide more viscosity and possible very slightly lower running temps or just the opposite? I’m not a professional, but it seems there may be some correlation between weight and temp all-though on a very minimal level. I know we need to keep things to VW 502.00 spec. Sure will be nice when my manually finally arrives on Thursday… 
